WebSVN – Code-Repo – Diff – /PIC Stuff/PIC_27J13/nfc.c

 #include "i2c.h"
 #include <string.h>
 #include <delays.h>
 static NFC_DATA nfc_data;
+static NFC_DATA *nfc_data_p = &nfc_data;
 // Const value arrays for comparison use
 static char pn532response_firmwarevers[] = {0x01, 0x00, 0x00, 0xFF, 0x06, 0xFA, 0xD5, 0x03};
 static char pn532ack[] = {0x01, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00};
     LATCbits.LATC2 = 1;
+}
 // Configures the SAM (Secure Access Module)
 unsigned char NFC_SAMConfig() {
-    nfc_data.packetbuffer[0] = PN532_COMMAND_SAMCONFIGURATION;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_SAMCONFIGURATION;
-    nfc_data.packetbuffer[1] = 0x01; // Normal mode
+    nfc_data_p->packetbuffer[1] = 0x01; // Normal mode
-    nfc_data.packetbuffer[2] = 0x14; // Timeout 50ms * 20 = 1s
+    nfc_data_p->packetbuffer[2] = 0x14; // Timeout 50ms * 20 = 1s
-    nfc_data.packetbuffer[3] = 0x01; // Use IRQ pin
+    nfc_data_p->packetbuffer[3] = 0x01; // Use IRQ pin
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 4))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 4))
         return 0;
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 8);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 8);
-    return (nfc_data.packetbuffer[7] == 0x15);
+    return (nfc_data_p->packetbuffer[7] == 0x15);
+}
 // Checks the firmware version of the PN5xx chip
 NFC_FIRMWARE_VERSION NFC_getFirmwareVersion(void) {
     NFC_FIRMWARE_VERSION response = {0, 0, 0, 0};
     // Create and send command
-    nfc_data.packetbuffer[0] = PN532_COMMAND_GETFIRMWAREVERSION;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_GETFIRMWAREVERSION;
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 1))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 1))
         return response;
     // Read back data from the PN532
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 12);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 12);
     // Compare and check returned values
-    if (strncmp((char *) nfc_data.packetbuffer, (char *) pn532response_firmwarevers, 8) != 0)
+    if (strncmp((char *) nfc_data_p->packetbuffer, (char *) pn532response_firmwarevers, 8) != 0)
         return response;
     // Save and return info
-    response.IC = nfc_data.packetbuffer[8];
+    response.IC = nfc_data_p->packetbuffer[8];
-    response.Ver = nfc_data.packetbuffer[9];
+    response.Ver = nfc_data_p->packetbuffer[9];
-    response.Rev = nfc_data.packetbuffer[10];
+    response.Rev = nfc_data_p->packetbuffer[10];
-    response.Support = nfc_data.packetbuffer[11];
+    response.Support = nfc_data_p->packetbuffer[11];
     return response;
+}
 // Sends a command and waits a specified period for the ACK
+}
 // Passive polling, waits for an ISO14443A target to enter the field
 unsigned char NFC_readPassiveTargetID(NFC_TargetDataMiFare *cardData) {
-    nfc_data.packetbuffer[0] = PN532_COMMAND_INLISTPASSIVETARGET;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_INLISTPASSIVETARGET;
-    nfc_data.packetbuffer[1] = 2; // Max 2 cards at once
+    nfc_data_p->packetbuffer[1] = 2; // Max 2 cards at once
-    nfc_data.packetbuffer[2] = PN532_MIFARE_ISO14443A;  // Mifare only
+    nfc_data_p->packetbuffer[2] = PN532_MIFARE_ISO14443A;  // Mifare only
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 3))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 3))
         return 0;
     // Wait for IRQ line
     while (NFC_I2C_Read_Status() != PN532_I2C_READY);
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 35);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 35);
     /* InListPassiveTarget response should be in the following format:
      * Byte         Description
      * ----------   ------------------
      * b0           Data ACK
      * b9..N        NFC_TargetDataMiFare[2]
      * bN+1..N+2    Checksum + postamble
      */
     // Check # of tags found
-    if (!nfc_data.packetbuffer[8])
+    if (!nfc_data_p->packetbuffer[8])
         return 0;
     // Save data from first card
-    if (nfc_data.packetbuffer[13] == 4) {
+    if (nfc_data_p->packetbuffer[13] == 4) {
-        memcpy((char *)&cardData[0], (const char *)&nfc_data.packetbuffer[9], 9);
+        memcpy((char *)&cardData[0], (const char *)&nfc_data_p->packetbuffer[9], 9);
     } else {
-        memcpy((char *)&cardData[0], (const char *)&nfc_data.packetbuffer[9], 12);
+        memcpy((char *)&cardData[0], (const char *)&nfc_data_p->packetbuffer[9], 12);
+    }
     // Save data from second card
-    if (nfc_data.packetbuffer[8] == 2) {
+    if (nfc_data_p->packetbuffer[8] == 2) {
         // Offset will vary depending on length of first card
-        if (nfc_data.packetbuffer[13] == 4) {
+        if (nfc_data_p->packetbuffer[13] == 4) {
-            if (nfc_data.packetbuffer[22] == 4) {
+            if (nfc_data_p->packetbuffer[22] == 4) {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[18], 9);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[18], 9);
             } else {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[18], 12);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[18], 12);
+            }
         } else { // Length of first UID is 7
-            if (nfc_data.packetbuffer[25] == 4) {
+            if (nfc_data_p->packetbuffer[25] == 4) {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[21], 9);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[21], 9);
             } else {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[21], 12);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[21], 12);
+            }
+        }
+    }
     // Return the number of cards detected
-    return nfc_data.packetbuffer[8];
+    return nfc_data_p->packetbuffer[8];
+}
 // Active polling, returns number of cards in the field
 unsigned char NFC_pollTargets(unsigned char number, unsigned char period, NFC_TargetDataMiFare *cardData) {
-    nfc_data.packetbuffer[0] = PN532_COMMAND_INAUTOPOLL;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_INAUTOPOLL;
-    nfc_data.packetbuffer[1] = number; // Number of polling
+    nfc_data_p->packetbuffer[1] = number; // Number of polling
-    nfc_data.packetbuffer[2] = period; // Polling period in units of 150ms
+    nfc_data_p->packetbuffer[2] = period; // Polling period in units of 150ms
-    nfc_data.packetbuffer[3] = 0x10; // Check for Mifare cards only
+    nfc_data_p->packetbuffer[3] = 0x10; // Check for Mifare cards only
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 4))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 4))
         return 0;
     // Wait for IRQ line
     while (NFC_I2C_Read_Status() != PN532_I2C_READY);
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 37);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 37);
     /* InAutoPoll response should be in the following format:
      * Byte         Description
      * ----------   ------------------
      * b0           Data ACK
      * b9..N        NFC_TargetDataMiFare[1/2]
      * bN+1..N+2    Checksum + postamble
      */
     // Check # of tags found
-    if (!nfc_data.packetbuffer[8])
+    if (!nfc_data_p->packetbuffer[8])
         return 0;
         // Save data from first card
-    if (nfc_data.packetbuffer[15] == 4) {
+    if (nfc_data_p->packetbuffer[15] == 4) {
-        memcpy((char *)&cardData[0], (const char *)&nfc_data.packetbuffer[11], 9);
+        memcpy((char *)&cardData[0], (const char *)&nfc_data_p->packetbuffer[11], 9);
     } else {
-        memcpy((char *)&cardData[0], (const char *)&nfc_data.packetbuffer[11], 12);
+        memcpy((char *)&cardData[0], (const char *)&nfc_data_p->packetbuffer[11], 12);
+    }
     // Save data from second card
-    if (nfc_data.packetbuffer[8] == 2) {
+    if (nfc_data_p->packetbuffer[8] == 2) {
         // Offset will vary depending on length of first card
-        if (nfc_data.packetbuffer[15] == 4) {
+        if (nfc_data_p->packetbuffer[15] == 4) {
-            if (nfc_data.packetbuffer[26] == 4) {
+            if (nfc_data_p->packetbuffer[26] == 4) {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[22], 9);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[22], 9);
             } else {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[22], 12);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[22], 12);
+            }
         } else {
-            if (nfc_data.packetbuffer[29] == 4) {
+            if (nfc_data_p->packetbuffer[29] == 4) {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[25], 9);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[25], 9);
             } else {
-                memcpy((char *)&cardData[1], (const char *)&nfc_data.packetbuffer[25], 12);
+                memcpy((char *)&cardData[1], (const char *)&nfc_data_p->packetbuffer[25], 12);
+            }
+        }
+    }
     // Return the number of cards detected
-    return nfc_data.packetbuffer[8];
+    return nfc_data_p->packetbuffer[8];
+}
 // Indicates whether the specified block number is the first block
 //      in the sector (block 0 relative to the current sector)
 unsigned char NFC_mifareclassic_IsFirstBlock(unsigned long uiBlock) {
     // keyData = Pointer to a byte array containing the 6 byte key value
     unsigned char i;
     // Assemble frame data
-    nfc_data.packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE; /* Data Exchange Header */
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE; /* Data Exchange Header */
-    nfc_data.packetbuffer[1] = 1; /* Max card numbers */
+    nfc_data_p->packetbuffer[1] = 1; /* Max card numbers */
-    nfc_data.packetbuffer[2] = (keyNumber) ? MIFARE_CMD_AUTH_A : MIFARE_CMD_AUTH_B;
+    nfc_data_p->packetbuffer[2] = (keyNumber) ? MIFARE_CMD_AUTH_A : MIFARE_CMD_AUTH_B;
-    nfc_data.packetbuffer[3] = blockNumber; /* Block Number (1K = 0..63, 4K = 0..255 */
+    nfc_data_p->packetbuffer[3] = blockNumber; /* Block Number (1K = 0..63, 4K = 0..255 */
     for (i = 0; i < 6; i++) {
-        nfc_data.packetbuffer[4 + i] = keyData[i];
+        nfc_data_p->packetbuffer[4 + i] = keyData[i];
+    }
     for (i = 0; i < uidLen; i++) {
-        nfc_data.packetbuffer[10 + i] = uid[i];
+        nfc_data_p->packetbuffer[10 + i] = uid[i];
+    }
     // Send frame and check for ACK
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 10 + uidLen))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 10 + uidLen))
         return 0;
     // Read response from PN532
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 12);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 12);
     return 1;
+}
 // Tries to read an entire 16-byte data block at the specified block address
 unsigned char NFC_mifareclassic_ReadDataBlock(unsigned char blockNumber, unsigned char *data) {
     unsigned char i;
     // Assemble frame data
-    nfc_data.packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
-    nfc_data.packetbuffer[1] = 1; /* Card number */
+    nfc_data_p->packetbuffer[1] = 1; /* Card number */
-    nfc_data.packetbuffer[2] = MIFARE_CMD_READ; /* Mifare Read command = 0x30 */
+    nfc_data_p->packetbuffer[2] = MIFARE_CMD_READ; /* Mifare Read command = 0x30 */
-    nfc_data.packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
+    nfc_data_p->packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
     // Send frame and check for ACK
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 4))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 4))
         return 0;
     // Read reponse
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 26);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 26);
     // If byte 9 isnt 0x00 we probably have and error
-    if (nfc_data.packetbuffer[8] != 0x00) {
+    if (nfc_data_p->packetbuffer[8] != 0x00) {
         return 0;
+    }
     // Copy the 16 data bytes into the data buffer
     // Block contents starts at byte 10 of a valid response
     for (i = 0; i < 16; i++) {
-        data[i] = nfc_data.packetbuffer[9 + i];
+        data[i] = nfc_data_p->packetbuffer[9 + i];
+    }
     return 1;
+}
 // Tries to write an entire 16-byte data block at the specified block address
 unsigned char NFC_mifareclassic_WriteDataBlock(unsigned char blockNumber, unsigned char *data) {
     unsigned char i;
     // Assemble frame data
-    nfc_data.packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
+    nfc_data_p->packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
-    nfc_data.packetbuffer[1] = 1; /* Card number */
+    nfc_data_p->packetbuffer[1] = 1; /* Card number */
-    nfc_data.packetbuffer[2] = MIFARE_CMD_WRITE; /* Mifare Write command = 0xA0 */
+    nfc_data_p->packetbuffer[2] = MIFARE_CMD_WRITE; /* Mifare Write command = 0xA0 */
-    nfc_data.packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
+    nfc_data_p->packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
     for (i = 0; i < 16; i++) { /* Data Payload */
-        nfc_data.packetbuffer[4 + i] = data[i];
+        nfc_data_p->packetbuffer[4 + i] = data[i];
+    }
     // Send frame and check for ACK
-    if (!NFC_sendCommandCheckAck(nfc_data.packetbuffer, 20))
+    if (!NFC_sendCommandCheckAck(nfc_data_p->packetbuffer, 20))
         return 0;
     // Read response
-    NFC_I2C_Read_Data(nfc_data.packetbuffer, 26);
+    NFC_I2C_Read_Data(nfc_data_p->packetbuffer, 26);
     return 1;
+}
 // Formats a Mifare Classic card to store NDEF Records

Subversion Repositories Code-Repo

(root)/PIC Stuff/PIC_27J13/nfc.c @ 128 – Rev 126 → 128